Leviticus 20:6Whoever turns to mediums or spiritists to prostitute himself with them, I will also set My face against that person and cut him off from his people.

Leviticus 20:27A man or a woman who is a medium or a spiritist must surely be put to death. They shall be stoned; their blood is upon them.'"

Deuteronomy 18:10Let no one be found among you who sacrifices his son or daughter in the fire, practices divination or conjury, interprets omens, practices sorcery,

Deuteronomy 18:11casts spells, consults a medium or familiar spirit, or inquires of the dead.

1 Samuel 28:3Now by this time Samuel had died, and all Israel had mourned for him and buried him in Ramah, his own city. And Saul had removed the mediums and spiritists from the land.

1 Samuel 28:9But the woman replied, "Surely you know what Saul has done, how he has killed the mediums and spiritists in the land. Why have you set a trap to get me killed?"

2 Kings 21:6He sacrificed his own son in the fire, practiced sorcery and divination, and consulted mediums and spiritists. He did great evil in the sight of the LORD, provoking Him to anger.

2 Kings 23:24Furthermore, Josiah removed the mediums and spiritists, the household gods and idols, and all the abominations that were seen in the land of Judah and in Jerusalem. He did this to carry out the words of the law written in the book that Hilkiah the priest had found in the house of the LORD.

1 Chronicles 10:13So Saul died for his unfaithfulness to the LORD, because he did not keep the word of the LORD and even consulted a medium for guidance,

2 Chronicles 33:6He sacrificed his sons in the fire in the Valley of Hinnom. He practiced sorcery, divination, and witchcraft, and consulted mediums and spiritists. He did great evil in the sight of the LORD, provoking Him to anger.

Isaiah 8:19When men tell you to consult the spirits of the dead and the spiritists who whisper and mutter, shouldn't a people consult their God instead? Why consult the dead on behalf of the living?

Treasury of Scripture

Regard not them that have familiar spirits, neither seek after wizards, to be defiled by them: I am the LORD your God.

Leviticus 20:6,7,27 And the soul that turneth after such as have familiar spirits, and after wizards, to go a whoring after them, I will even set my face against that soul, and will cut him off from among his people…

(31) Regard not.--Better, Turn ye not unto, as the Authorised Version renders this very phrase in Leviticus 19:4.

Them that have familiar spirits.--This phrase represents the single word oboth in the original, and the translators of our Authorised Version by adopting it implied that those who practised this craft were supposed to be attended by an invisible spirit who was subject to their call to supply them with supernatural information. According to the authorities during the second Temple it denotes one who has a spirit speaking from under his arm-holes, or chest, with a hollow voice, as if it came out of a bottle, which is the meaning of ob in Job 32:19. They identified it with the spirit of Python, by which the ancient Chaldee Version renders it.

Neither seek after wizards.--The expression "wizard," which in old English denotes "wise man," "sage," is almost the exact equivalent of the word in the original. These cunning men pretended to tell people their fortunes, where their lost property was to be found, &c. According to ancient tradition, these wizards took in their mouth a bone of a certain bird called yadu?, burned incense, thus producing fumes which sent them off into an ecstacy, and then foretold future events. Hence their name, yidonee, as it is in the original. It occurs eleven times in the Bible, and always together with the word translated "familiar spirit."

Verse 31. - This verse contains a prohibition of all dealings with those that have familiar spirits or are wizards. The punishment of such persons is appointed in the next chapter. Both in the Old and the New Testament, the real existence of evil spirits and their power of communicating with the human spirit is assumed.